<template>
	<div class="wscn-http404-container">
		<div class="wscn-http404">
			<div class="pic-404">
				<img class="pic-404__parent" :src="img_404" alt="404">
				<img class="pic-404__child left" :src="img_404_cloud" alt="404">
				<img class="pic-404__child mid" :src="img_404_cloud" alt="404">
				<img class="pic-404__child right" :src="img_404_cloud" alt="404">
			</div>
			<div class="bullshit">
				<div class="bullshit__oops">OOPS!</div>
				<div class="bullshit__headline">{{ message }}</div>
				<div class="bullshit__info">请检查您输入的URL是否正确，或单击下面的按钮返回主页。</div>
				<a href="" class="bullshit__return-home">返回主页</a>
			</div>
		</div>
	</div>
</template>

<script>
	import img_404 from "/@/assets/404_images/404.png"
	import img_404_cloud from "/@/assets/404_images/404_cloud.png"
	import {
		computed
	} from "vue"

	export default {
		name: 'Page404',
		setup() {
			const message = computed(() => {
				return "您访问的页面丢失了...";
			})
			return {
				message,
				img_404,
				img_404_cloud,
			}
		}
	}
</script>

<style lang="scss" scoped>
	.wscn-http404-container {
		transform: translate(-50%, -50%);
		position: absolute;
		top: 40%;
		left: 50%;
	}

	.wscn-http404 {
		position: relative;
		width: 1200px;
		padding: 0 50px;
		overflow: hidden;

		.pic-404 {
			position: relative;
			float: left;
			width: 600px;
			overflow: hidden;

			&__parent {
				width: 100%;
			}

			&__child {
				position: absolute;

				&.left {
					width: 80px;
					top: 17px;
					left: 220px;
					opacity: 0;
					animation-name: cloudLeft;
					animation-duration: 2s;
					animation-timing-function: linear;
					animation-fill-mode: forwards;
					animation-delay: 1s;
				}

				&.mid {
					width: 46px;
					top: 10px;
					left: 420px;
					opacity: 0;
					animation-name: cloudMid;
					animation-duration: 2s;
					animation-timing-function: linear;
					animation-fill-mode: forwards;
					animation-delay: 1.2s;
				}

				&.right {
					width: 62px;
					top: 100px;
					left: 500px;
					opacity: 0;
					animation-name: cloudRight;
					animation-duration: 2s;
					animation-timing-function: linear;
					animation-fill-mode: forwards;
					animation-delay: 1s;
				}

				@keyframes cloudLeft {
					0% {
						top: 17px;
						left: 220px;
						opacity: 0;
					}

					20% {
						top: 33px;
						left: 188px;
						opacity: 1;
					}

					80% {
						top: 81px;
						left: 92px;
						opacity: 1;
					}

					100% {
						top: 97px;
						left: 60px;
						opacity: 0;
					}
				}

				@keyframes cloudMid {
					0% {
						top: 10px;
						left: 420px;
						opacity: 0;
					}

					20% {
						top: 40px;
						left: 360px;
						opacity: 1;
					}

					70% {
						top: 130px;
						left: 180px;
						opacity: 1;
					}

					100% {
						top: 160px;
						left: 120px;
						opacity: 0;
					}
				}

				@keyframes cloudRight {
					0% {
						top: 100px;
						left: 500px;
						opacity: 0;
					}

					20% {
						top: 120px;
						left: 460px;
						opacity: 1;
					}

					80% {
						top: 180px;
						left: 340px;
						opacity: 1;
					}

					100% {
						top: 200px;
						left: 300px;
						opacity: 0;
					}
				}
			}
		}

		.bullshit {
			position: relative;
			float: left;
			width: 300px;
			padding: 30px 0;
			overflow: hidden;

			&__oops {
				font-size: 32px;
				font-weight: bold;
				line-height: 40px;
				color: #1482f0;
				opacity: 0;
				margin-bottom: 20px;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-fill-mode: forwards;
			}

			&__headline {
				font-size: 20px;
				line-height: 24px;
				color: #222;
				font-weight: bold;
				opacity: 0;
				margin-bottom: 10px;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-delay: 0.1s;
				animation-fill-mode: forwards;
			}

			&__info {
				font-size: 13px;
				line-height: 21px;
				color: grey;
				opacity: 0;
				margin-bottom: 30px;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-delay: 0.2s;
				animation-fill-mode: forwards;
			}

			&__return-home {
				display: block;
				float: left;
				width: 110px;
				height: 36px;
				background: #1482f0;
				border-radius: 100px;
				text-align: center;
				color: #ffffff;
				opacity: 0;
				font-size: 14px;
				line-height: 36px;
				cursor: pointer;
				animation-name: slideUp;
				animation-duration: 0.5s;
				animation-delay: 0.3s;
				animation-fill-mode: forwards;
			}

			@keyframes slideUp {
				0% {
					transform: translateY(60px);
					opacity: 0;
				}

				100% {
					transform: translateY(0);
					opacity: 1;
				}
			}
		}
	}
</style>